package concurrent;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class ExtThreadPool {

    public static class MyTask implements Runnable {

        public String name;

        public MyTask(String name) {
            this.name = name;
        }

        @Override
        public void run() {
            System.out.println("正在执行 : thread id : " + Thread.currentThread().getId() + ", task name = " + name);
//            try {
//                Thread.sleep(100);
//            } catch (InterruptedException e) {
//                e.printStackTrace();
//            }
        }
    }

    public static void main(String[] args) throws InterruptedException {
        ExecutorService service = new ThreadPoolExecutor(5, 5, 0L,
                TimeUnit.SECONDS, new LinkedBlockingQueue<>()) {
            @Override
            protected void beforeExecute(Thread t, Runnable r) {
                System.out.println("准备执行 ：" + ((MyTask)r).name);
            }

            @Override
            protected void afterExecute(Runnable r, Throwable t) {
                System.out.println("执行完成 ：" + ((MyTask)r).name);
            }

            @Override
            protected void terminated() {
                System.out.println("线程池退出");
            }
        };

        for (int i=0; i<5; i++) {
            MyTask task = new MyTask("task" + i);
            service.execute(task);
            Thread.sleep(10);
        }
        service.shutdown();
    }

}
